encryption – Page 4 – Tarik Billa

Ansible: How to encrypt some variables in an inventory file in a separate vault file?

February 11, 2023 by Tarik

Since Ansible 2.3 you can encrypt a Single Encrypted Variable. IMO, a walkthrough is needed as the doco’s seem pretty terse. Given an example of: mysql_password: password123 (within main.yml) Run a command such as: ansible-vault encrypt_string password123 –ask-vault-pass This will produce: !vault | $ANSIBLE_VAULT;1.1;AES256 66386439653236336462626566653063336164663966303231363934653561363964363833 3136626431626536303530376336343832656537303632313433360a626438346336353331 Encryption successful paste this into your main.yml: mysql_password: !vault … Read more

what is the difference between various keys in public key encryption

February 10, 2023 by Tarik

Why is XOR used in cryptography?

January 24, 2023 by Tarik

It isn’t exactly true to say that the logical operation XOR is the only one used throughout all cryptography, however it is the only two way encryption where it is used exclusively. Here is that explained: Imagine you have a string of binary digits 10101 and you XOR the string 10111 with it you get … Read more

AES Encryption – Key versus IV

January 20, 2023 by Tarik

As you can see from the other answers, having a unique IV per encrypted file is crucial, but why is that? First – let’s review why a unique IV per encrypted file is important. (Wikipedia on IV). The IV adds randomness to your start of your encryption process. When using a chained block encryption mode … Read more

Protecting Java Source Code From Being Accessed [closed]

January 7, 2023 by Tarik

I had the same problem as you a long time ago. We had Windows 2000 machines and uploaded files to a Novel network folder that everyone could see. I used several tricks to beat even the best thieves: whitespace watermarking; metadata watermarking; unusual characters; trusted timestamping; modus operandi. Here’s them in order. Whitespace watermarking: This … Read more

Can’t check signature: public key not found

January 5, 2023 by Tarik

You get that error because you don’t have the public key of the person who signed the message. gpg should have given you a message containing the ID of the key that was used to sign it. Obtain the public key from the person who encrypted the file and import it into your keyring (gpg2 … Read more

How to Export Private / Secret ASC Key to Decrypt GPG Files

January 4, 2023 by Tarik

You can export the private key with the command-line tool from GPG. It works on the Windows-shell. Use the following command: gpg –export-secret-keys A normal export with –export will not include any private keys, therefore you have to use –export-secret-keys. Edit: To sum up the information given in my comments, this is the command that … Read more

What’s the difference between id_rsa.pub and id_dsa.pub?

January 2, 2023 by Tarik

id_rsa.pub and id_dsa.pub are the public keys for id_rsa and id_dsa. If you are asking in relation to SSH, id_rsa is an RSA key and can be used with the SSH protocol 1 or 2, whereas id_dsa is a DSA key and can only be used with SSH protocol 2. Both are very secure, but … Read more

What’s the difference between SHA and AES encryption? [closed]

December 28, 2022 by Tarik

SHA isn’t encryption, it’s a one-way hash function. AES (Advanced_Encryption_Standard) is a symmetric encryption standard. AES Reference

What is the difference between DSA and RSA?

December 25, 2022 by Tarik

Check AVA’s answer below. My old answer seems wrong